Common Stock - Pre-Closing Stock Repurchase (Details) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended	6 Months Ended		12 Months Ended
	Jan. 20, 2021	May 31, 2020	Mar. 31, 2021	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Class of Stock [Line Items]
Payments for repurchase of common stock				$ 22,027	$ 0
Pre-closing stock repurchase, net of exercise of vested options			$ 21,902
Common Class A
Class of Stock [Line Items]
Stock repurchased and retired during period (in shares)	2,207,580
Payments for repurchase of common stock	$ 22,000					$ 100
Pre-closing stock repurchase, net of exercise of vested options (in shares)	183,548	509,602				85,594
Pre-closing stock repurchase, net of exercise of vested options	$ 1,800